Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
FRASS PRODUCTION OF LAST INSTAR LARVAE OF THE BEECH CATERPILLAR, QUADRICALCARIFERA-PUNCTATELLA (MOTSCHULSKY) (LEP-NOTODONTIDAE), AND METHODOF ESTIMATING THEIR DENSITY
Autore:
KAMATA N; YANBE T;
Indirizzi:
TOHOKU RES CTR FORESTRY & FOREST PROD RES INST,FOREST ENTOMOL LAB,NABEYASHIKI 72 MORIOKA IWATE 02001 JAPAN
Titolo Testata:
Journal of applied entomology
fascicolo: 1, volume: 117, anno: 1994,
pagine: 84 - 91
SICI:
0931-2048(1994)117:1<84:FPOLIL>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
N. Kamata e T. Yanbe, "FRASS PRODUCTION OF LAST INSTAR LARVAE OF THE BEECH CATERPILLAR, QUADRICALCARIFERA-PUNCTATELLA (MOTSCHULSKY) (LEP-NOTODONTIDAE), AND METHODOF ESTIMATING THEIR DENSITY", Journal of applied entomology, 117(1), 1994, pp. 84-91

Abstract

The purpose of this study was to investigate frass pr?duction of the beech caterpillar, Quadricalcarifera punctatella and to develop a method for estimating the field density of its last instar larvae from fallen pellets. About 90 % of larval frass was produced during the last instar period. The number of pellets was a better parameter for densityestimation than the weight. Pellets wider than 1.8 mm were judged as the last instar stage. The number of frass pellets produced per day orper hour in the last instar was influenced by many factors: larval age, photoperiod, and especially temperature. However the total number of pellets produced during the last instar was relatively constant (= 630) regardless of temperature and photoperiod. The total number of last instar pellets produced per m2 in the season was divided by 630; thequotient gives the total density of the last instar in the season. This method, based on SOUTHWOOD-JEPSON'S graphical method, is very simple but reliable because the estimates are not influenced by temperature, and because the sum total of falling pellets can be estimated correctly by setting traps throughout the entire season.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 22:10:59